Global ETD Search

A methodology for state determination without prior information using X-ray pulsar navigation systems

Lohan, KevinUniversity of Illinois at Urbana-Champaign2022

Onboard measurements of periodic x-ray signals from highly stable, rapidly spinning stars called pulsars, enable determination of spacecraft position, velocity, and attitude states. Due to the short period of pulsar signals, X-ray pulsar based navigation (XNAV), may result in position ambiguity …

uiuc Repository record for A methodology for state determination without prior information using X-ray pulsar navigation systems (opens in a new tab)

Dynamical and Radiative Properties of X-Ray Pulsar Accretion Columns: Effects of Gas and Radiation Pressure

West, Brent Frederick2012

gmu

X-ray timing of the accreting millisecond pulsar SAX J1808.4-3658

Hartman, Jacob M., Ph. D. Massachusetts Institute of TechnologyMassachusetts Institute of Technology2007

We present a 7 yr timing study of the 2.5 ms X-ray pulsar SAX J1808.4-3658, an X-ray transient with a recurrence time of =2 yr, using data from the Rossi X-ray Timing Explorer covering 4 transient outbursts (1998-2005). Substantial pulse shape variability, both stochastic and systematic, was …

mit Repository record for X-ray timing of the accreting millisecond pulsar SAX J1808.4-3658 (opens in a new tab)